What was found
AFT CARGO FIRE WARNING DURING TAXI WITH MOMENTARY STATUS MSG "FIRE DET AFT 2". FIRE CARGO AFT" WARNING DURING TAXI WITH STATUS MSG "CARGO DET AFT 2". TRANSFERRED TO MEL 26-16-01-02-02A MX ACTIONS COMPLIED WITH MDDR 222676. SWAPPED LOWER AFT CARGO SMOKE DETECTOR LOOP A, P/N PPC1200-00, S/N 51450, WITH LOOP B P/N PPC1200-00, S/N 3050 IN ACCORDANCE WITH AMM 26-14-01/401. OPS CHECK GOOD AT THIS TIME. LOOP B MESSAGE CLEARED.